Premises and Equipment Components of Premises and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 97,561	$ 93,532
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	66,525	61,333
Premises and equipment, net	31,036	32,199
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	43,433	41,625
Furniture Fixtures and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	49,039	46,809
Building [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	4,715	4,724
Land [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 374	$ 374